While some RenderMan plugins integrate the Denoise feature, RenderMan does ship with a tool for processing images after rendering. Keep in mind that the appropriate AOVs must be included for the Denoise filter to work.
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Denoising does not affect the alpha channel of images. Doing so can cause artifacts and halos to form and is therefore avoided. |
GPU Acceleration
Denoise can attempt to use GPU acceleration. You can activate this mode by adding --override gpuIndex 0 to the command line, where the number indicates which GPU to use. In a single-GPU system, this will always be 0. If no compatible hardware is found it will failover to CPUs. Using the GPU requires CUDA 7.0 5 (compute capability 2.0 or later) and a capable graphics card with support.
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gpuIndex corresponds to the GPU installed to use for denoising. If -1 is used, it will use the CPU instead.
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"//": "Global settings which apply across all filteres/kernels:", "filterLayersIndependently": false, "//": "If true, filters each render output using weights affected", "//": "by its color, reducing artifacts but violating additivity", "//": "and imposing a speed and memory penalty.", "//": "If false, uses the same weights for all to-be-filtered layers, ", "//": "ensuring additivity.", "splitSpecularDiffuse": true, "//": "If true, filters specular and diffuse separately", "splitSpecularDiffuseVariances": true, "//": "When splitSpecularDiffuse and the file has diffuse_var and", "//": "specular_var layers, use them.", "warpType": "linear", "//": "cross-frame warp method: linear or nearest", "gpuIndex": 0, "//": "use GPU denoising on graphics card #0", |
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sigmaAlphaOnly.filter.json
Used to filter based on image alpha.
volume.filter.json
Used for volumes rendered alone onto transparent black.
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There are also several override filter settings that can be combined with the base filters. Notice these are named as filteroverride.filterLayersIndependently. filteroverride.json
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fireflyKiller.filteroverride.json
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